Method of making laminated structures.



1. E. RHUADS. METHOD OF MAKING LAMINATED STRUCTURES.

V I APPLICATION FILED AUG. I5, 1914. I v 1,140,187. latuntmTMny 18, 1915.

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l To all. win me: may concern Be it imown that l, JOSEPE Enom'finonns, a citizen, of the United States, residingin li ilmington, New Castle county, State of Delaware, have invented certain improve ments in'Methods of Making Laminated fitructuresrof which the following isa specification.

object of this invention is to provide he of making a composite structure of an; icngeh, consisting of a number of layers or laminations, which shall require considerable less labor and material for its production than has hitherto been expended to mum were the same product, and which shall result in an article of generally superior no" fie.

Another object of the invention isto provide a novel succession of steps for an elongated structure of uniform thickness, from a number of layers of vsri-a' ole thickness.

These objects and other advantageous ends I secure as hereinafter-set forth, refer,-

ence being had to the accompanying draw ings in which;

Figures 1 and 2 are diagrammatic elevetions partly in section illustrating" two machines which may be employed in carrying out my invention.

In carrying out nay-invention I first form any desired number of single thiclmess lengths which in many cases would each-be made of a suitable number of sheem connected together end to end, being noted that theresulting structure is ,relatit'ely flexible and varies in thickness throughout its length, although for the most part, thick portions alternate with portions.

Assuming that the finished structure is to consist of two layers, I lay foneofthe-lengths made as above upon sfperfectly flat surface and thereafter so fit the s'econd length of material to it by cutting sway or building up that when the two are superimposed the resulting laminated structure'is of substantially uniform thickness, although there are still areas of greater or less extent in which the combined thickness of the two layers is greater than that desired in the finished product. After these two layers or lengths have been trimmed or built out so that when together they form a structure whose thickness isapproximately uniform, they are separated and the lower face of the first" leyer is placed in contact with the top face specification of Letitens Patent.

v new m mes, wise eerie: m seem.

relatively to each other.

originally fitted together.

of 'iil'l upper layer, and the resulting length PatentcdMa-y R8, 1915. p

of materiel is fed through an evening machine whose elements are diagrammatically illustrated in Fig. 1. In this machine both parse of the composite or laminated-structure are caused to move at the some speed by means of nip rolls 1-1 and 22 so that they paw between a supporting roller or other guide structure 3 and a cutter 4,. such as a hand knife, mounted with its cutting" edge at s fi-xed distance from or parallel with the top surface of said guide 3; it being undesstcod that while passing through this machine the layers 5 and 6 can not move As a result all parts of the entire length of the structure 5-6are-of uniform thickness, it being noted that in this case the layer 6 is used as a gage,

to determine the amount of mat rial to be out ofi efthe layer 5 in engag out with that faced the layer 6 which pasm'd over the guide 3S0. or inlother words, they are again joined the same relative positions as when I Before so placlug-them together for the last time, a suitable adhesive is applied to either or both of their adiiuhent feces and they are permanently united by I hydraulic pressure or otherwise, being also riveted or connected by other suitable means if desired.

After the first approximate fitting to- I getherofthe layers 5 and 6 to make a single laminated structure, instead of reversing and tninmring what had beentheir contactingfaces I may employ a machine of the form shown in Fi 2, whereby the layer 5 is fed by nip rolls -'7 and 88 under suitcllie guides such as the rollers '9 and 1,0,and overs roll or other movable guide member 11 rigidly connected to an evening knife 12. The'leyer'ti is likewise fed through the machine by nip rolls 1313'and le14,.'over the guidebar or roller 15, with its topface' in position to be acted on by the cutting edge of the knife 12. Since as above-noted, this knife with the gage roller 11 is free to move toward and from the two rollers 9 and 15, and since the two layers of material 5 and 6 are fed through the machine at exactly the same rate, the layer 5 will serve as a gage to move the knife 12 up or down and cause it to cut from the layer 6 just that quantity of material which must be removed in order that the combined layers shall. result in a single structure of absolutely uniform thickness. Both of the layers are complementary to each other and in passing through the machine one of them serves as a to be removed from the other at any point in order that together they may form a single structure of uniform thickness throughout its length and breadth. After leaving the machine shown in Fig. 2 the two layers of material are permanently united byf cement or otherwise to form the as agage to' determine the amount of material to be trimmed from the other before they were permanently united to form a single structure of uniform thickness.

I claim:

1. The method of making a" laminated structure which consists in loosely superimposing a plurality of layers of material;

trimming the same while superimposed to 1 cause the combined thickness of said layers to be accurately uniform throughout the.

- structure which consists in loosely superim-'- uniting said layers to form length thereof; and thereafter permanently posite structure. I

- 2. The method of making a laminated posing a plurality of layers of material;

trimming one of said layers while superimposed to cause the combined thickness of the several layers to be uniform throughout. the length thereof; and thereafter permanentlyuniting said layers to form a single composite structure.

3.'The method of making a laminated structure which consists in approximately gage to determine the amount a single comfitting together a plurality of layers of ma:

I terial of varying thickness to form a loose laminated structure of substantially uniform thickness when said layers are superimposed; trimming said structure to make 1t accurately uniform in thickness; and there'.

after permanently uniting the layers to form a'single composite structure.

4-. The method of making 'a laminated structure which consists in approximately fitting together'a plurality of layers of material to make their combined stantially uniform; reversing said layers'to bring their outside surfaces into engagement; operating on the layers to make the th1ckness,,sub-

combined thickness of said layers accurately uniform; reversing said layers to restore them to their original relative positions;

and permanently uniting the layers. "5. The method of making a lami structure which consists in approximately fitting together a plurality of layers of material to form a loose laminated structure of, substantially uniform thickness; cutting said structure to make their combined thicknesses accurately uniformhand thereafter permanently uniting said layers.

6. The method of making a laminated structure which consists in approximately fitting together a plurality of layers of material to make their combined thickness sub-- nated I from one of said layers -an amount automatically determined by the remainder of:

stantially uniform; reversing said layers to bring their outside surfaces into engagement; trimming one of the layers to make the combined thickness of said layers accurately uniform; reversing said layers to restore them to their original relative positions; and permanently uniting the layers.

In testimony whereof, I have signed my name to this specification, in the presence of two-subscribing witnesses.

p JOSEPH EDGAR niioAns. vWitnesses: i I

' WILLIAM 'E. BRADLEY;

J'os. H. Knnrn. 

